# Potomac, Montana

Potomac is an unincorporated community and census-designated place (CDP) in Missoula County, Montana, United States. It was first listed as a CDP prior to the 2020 census, at which time it had a population of 26.

## Geography

Potomac is in the southeastern part of Missoula County, in the valley of Camas Creek and Union Creek, which flows northwest to the Blackfoot River, part of the Clark Fork watershed. Montana Highway 200 passes along the northern edge of the community, leading northeast 28 miles (45 km) to Ovando and west 23 miles (37 km) to Missoula.
According to the U.S. Census Bureau, the Potomac CDP has an area of 0.28 square miles (0.73 km$^2$), all land.

### Climate

According to the Köppen Climate Classification system, Potomac has a warm-summer humid continental climate, abbreviated "Dfb" on climate maps. The hottest temperature recorded in Potomac was 103 °F (39.4 °C) on July 14, 002, while the coldest temperature recorded was −50 °F (−45.6 °C) on December 23–24, 1983.
Climate data for Potomac, Montana, 1991–2020 normals, extremes 1964–present :
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 60 (16) | 64 (18) | 76 (24) | 86 (30) | 97 (36) | 97 (36) | 103 (39) | 102 (39) | 97 (36) | 88 (31) | 72 (22) | 64 (18) | 103 (39) |
| Mean maximum °F (°C) | 46.2 (7.9) | 50.6 (10.3) | 62.4 (16.9) | 74.3 (23.5) | 83.4 (28.6) | 88.4 (31.3) | 95.3 (35.2) | 94.3 (34.6) | 89.2 (31.8) | 76.6 (24.8) | 55.7 (13.2) | 44.7 (7.1) | 97.0 (36.1) |
| Mean daily maximum °F (°C) | 29.8 (−1.2) | 35.0 (1.7) | 45.5 (7.5) | 53.8 (12.1) | 64.0 (17.8) | 71.3 (21.8) | 82.0 (27.8) | 81.8 (27.7) | 71.0 (21.7) | 55.4 (13.0) | 39.3 (4.1) | 29.1 (−1.6) | 54.8 (12.7) |
| Daily mean °F (°C) | 19.1 (−7.2) | 21.7 (−5.7) | 31.5 (−0.3) | 38.8 (3.8) | 46.9 (8.3) | 54.8 (12.7) | 61.3 (16.3) | 60.2 (15.7) | 51.5 (10.8) | 39.4 (4.1) | 27.7 (−2.4) | 18.9 (−7.3) | 39.3 (4.1) |
| Mean daily minimum °F (°C) | 8.3 (−13.2) | 8.5 (−13.1) | 17.5 (−8.1) | 23.8 (−4.6) | 29.9 (−1.2) | 38.3 (3.5) | 40.6 (4.8) | 38.7 (3.7) | 32.0 (0.0) | 23.4 (−4.8) | 16.2 (−8.8) | 8.7 (−12.9) | 23.8 (−4.6) |
| Mean minimum °F (°C) | −17.6 (−27.6) | −13.5 (−25.3) | 1.0 (−17.2) | 13.6 (−10.2) | 18.9 (−7.3) | 28.2 (−2.1) | 32.6 (0.3) | 29.8 (−1.2) | 22.0 (−5.6) | 6.3 (−14.3) | −0.6 (−18.1) | −13.2 (−25.1) | −27.4 (−33.0) |
| Record low °F (°C) | −47 (−44) | −45 (−43) | −37 (−38) | −4 (−20) | 13 (−11) | 23 (−5) | 24 (−4) | 22 (−6) | 10 (−12) | −21 (−29) | −23 (−31) | −50 (−46) | −50 (−46) |
| Average precipitation inches (mm) | 1.38 (35) | 1.03 (26) | 0.76 (19) | 1.13 (29) | 1.86 (47) | 2.16 (55) | 0.83 (21) | 0.62 (16) | 0.91 (23) | 1.46 (37) | 1.55 (39) | 1.41 (36) | 15.10 (384) |
| Average snowfall inches (cm) | 15.5 (39) | 7.2 (18) | 4.6 (12) | 1.3 (3.3) | 0.4 (1.0) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.2 (0.51) | 1.9 (4.8) | 7.4 (19) | 13.3 (34) | 51.8 (131.61) |
| Average extreme snow depth inches (cm) | 11.1 (28) | 11.5 (29) | 9.5 (24) | 1.5 (3.8) | 0.2 (0.51) | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.1 (0.25) | 0.5 (1.3) | 3.8 (9.7) | 10.6 (27) | 16.8 (43) |
| Average precipitation days (≥ 0.01 in) | 8.0 | 5.9 | 5.6 | 5.6 | 8.0 | 9.5 | 5.4 | 3.9 | 5.4 | 7.0 | 8.0 | 8.2 | 80.5 |
| Average snowy days (≥ 0.1 in) | 5.6 | 4.8 | 2.8 | 0.7 | 0.1 | 0.0 | 0.0 | 0.0 | 0.1 | 0.8 | 2.9 | 6.5 | 24.3 |
| Source 1: NOAA ||||||||||||||
| Source 2: National Weather Service ||||||||||||||

## Media

The Seeley-Swan Pathfinder is the newspaper for Potomac. It is published weekly.

## Education

The school districts are Potomac Elementary School District and Missoula High School District.